Stoker-driving arm.



'1. W. BELL.

STDKER DRIVING ARM, APPLICATION FILED IULY 9.1914.

Pam tented Oct. 30,1917.

Be it known that l. Jonx lhcm, a vitizen ol the l'nited Slate ot'lhneriea. residing." at ('oring'ton. in the ronnt o't' Kenton i andState of Kllil'll-eli). ha \e invented eertain new and usefullmprorements in Stokerl')ri\iu ir .\rn'i. '.-ot whirh the following is aspeciliration. re't'e-renre lleing hail therein to the arroinpaintingdrawings.

in the operation of antomatir lm'nare stokers where a pluralit offeeding llltlli' hers reriprorated by means ol an operatin; shaft andsuitable driving n|erhani m therefor. when the feed lieeoun-R i-log'geilor any of the feed ilevires are prevented from operation in any way.parts of the lnerhalllSlli are broken due to the tart that the drivingmrrhanihifl is positively artuated by means ol. a motor. The olijrrt;ot'this inyenand ronvenientv means which may lie readily readjusted andrepaired without. great loss of time or expense. To'lhis eml theinvention roHHists in embodying in the driving n'ieehanism. an arm madein two pal-t eonnerted hy' ll'lilllS adapted to he disrupted underabnormal strain applied to, the arm and so eonstrurtm'l as to he readilyreplaced.

To this end the invention ronsi ts in the matters hereinafterset forthand more partieul -arl i' pointed out in the appendml rlaims, referencebeing had to the aeeompanying drawing, in whieh Figure 1 is a frontelevation of a portion of a furnare front. with portions hroken away toshow the. internal ronstrurl'iou oi the stoker mechanism emljiodi'e'dtherein and showing." derires emlu-utving the invention in operativeposition in ronnertion with the Htolflj drivingmeel'ianisn-1; and

lrig. 2 is anperspcet ive view of a device emhodying h}? invention.

old. and well lcnown alitoln'al ie Stoker (-01)- sl.|.'|,irl.i0n,..lu|l; it will he umlersloo l that the sauna mu)? he. applied as wellto other forms and (.UlIFtI'lHllUllH oi. ilri ri 'ig' inerlianisniswithout. departing from the spirit of this lilvention.

'lPli'eauton-iat-im: sloker illustrated in Fig. l rom -ii-ises, a.Hlliltlhll. 'leed' hopper or magazine l at; earli sideol a tile ehaiuher2 and beneath earh nmgazine whirl.) has an in- Specification of LettersPatent. A u'cano n filed July 9, 1914. Serial Nb. 849.884.

tion is to prevent snrh lireakag'es hrsin iplo.

'lflie inventnni is shown ans-applied to an.

UNITED STATES PATENT OFFICE.

JOHN BELL, OE QOVINGTON, KENTUCKY. ASSIGNOR TO MURPHY IRON WORKS, 0F

DETIIDIR'MIC IHIGAN, A CORYORATION OF MICHIGAN.

STOKER-IJRIVING ARM. 7

Patented (Jet. 30. 1917.

ries of siolc'er lioxes ll'or pushing the t'u'el arross the 'ol in gplate on to the upper enilii" of the ink-lined grate lflllfi'fl. "llieFtokri' mm are reriproeateil means (it sew-m nk] -rureil upon slnll'tsi' extending lon tir-GO dinully beneath [he seyeral I li'rr lioxes ithjtheir l'orwaril eu'il. projertiug through the l'ilrnare front plate H in'hirh are ilil'alile doors through whirl: arr'ws ma \"lie had a) theinterior of the 't'urnare. I i To turn the roi-k shalt T andri'wipmra'te' the stoker l|oxe! a longitmli'nal'l reripro rallle liar ismounted in suitable hearings upon the l'ront plate and this liar drijre'li" by memo: of ii vom'iertingr rod ll) pii'ota l attarllrd at oneend to the liar and at its opposite end to a drive wheel 11 adapted"t'0he aetuated in any suitable nmimer as by a steam engine (not shown). i

Secured upon thewonter squared end OfTB earh'shalt T is a suitable rrankarm Bern-- laulvingthia invention and each of these (rank arms isrinineeteil to the driving arm 9 by means of a link 13. all of the-partsbein; arranged in an old and well lcnown manner. ()thr-r shaft-s sin-has a clinker bar 14 and grate liar actuating, shafts 15 are also shownas leing ,ti-nned by nieans of the driving bar 9 through the medium ofcrank ar'ms l6 and 17. lt found desirable, the rranlc arm embodying theinvention may he substituted for the arms H3 or l7 .to prev ranged at a.distanre apart. and in the longitudinal center lineof the, member nearsaid end. i

.\n end member U' hape. to emluraee the free end' of the. member lS audis formed with (awnings to register with the openings in said member.

liolt. 2L PHSHlHg" through. oneof the openings inthe. meinher 1H and thea'lined-openings in --the loop. p-irotaJ-ly attarlies the loop to thearm 50 that it may swing thereon. Apin 22 is inserted through the otherofiiening ilrthe member lSand lilirougli' the alined openings in the looptohold the End ilre inl ijg og l p '20 of the arm is bent into 0 20 inlongitudinal alinement with the member 18 and prevent its turningrelatively thereto. The pin 22 is made from a coinparatively fragilematerial such as wood so that when a very heavy strain is put upon thearm by the link 13 which is hooked into the loop for transmitting motionfrom the bar 9 to the shaft 7, the pin will be sheared off and permitthe loop end of the arm to turn upon its pivotalconnection with the mainportion of the arm without turning the shaft 7. The strength of'tiie pin22 is such that under normal conditions it will hold the loop against,turning upon the member 18, of the arm and will transmit sul'li'cientpower to; turn the shaft 7 and reciprocate the Stoker boxes, but when'the stoking mechanism is prevented from actuation by becoming cloggedor from any other cause, the resistance offered to the turning oftheshaft 7 will break the pin and the strength of this pin is such that itwill break beforeany of the drivin mechanism 'or stoker parts will bebroken y the actuation ofthe driving mechanism.

Obviously changes may be made in the construction and arrangement of the'driv-- ing arm embodying this invention, without the free end of saidmain member, said main 5 member and end member being provided with twosides of alined transverse openings, a bolt passing through one set ofalined openings to form a pivotal connection between said member, and apin formed of fragile material'engaging the other set of openings tonormally prevent the end mem- 4 ber from turning upon the main member.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN W. BELL.

mark W1tnesses..

ED. J. Moss, CHAs. C. BRODNIX.

